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| Patents for William G. Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| 877,157 | Jan. 21, 1908 | W.G. Allen | Manufacture of wood-screws | screws | |
| 928,489 | Jul. 20, 1909 | W.G. Allen, R.G. Henry | Screw-thread-cutting mechanism | screw machines | |
| 960,244 | Jun. 07, 1910 | W.G. Allen | Manufacture of Screws | ||
| 1,560,193 | Nov. 03, 1925 | W.G. Allen | Drilling machines | drill presses | |